Sudden death syndrome

Genetic trends of absolute and relative heartweight in a male broiler line

L. G. Gaya, Costa, A. M. M. A., Ferraz, J. B. S., Rezende, F. M., Mattos, E. C., Eler, J. P., T. Filho, M., Mourão, G. B., and Figueiredo, L. G. G., Genetic trends of absolute and relative heartweight in a male broiler line, vol. 6, pp. 1091-1096, 2007.

Data of chickens from a broiler-breeding program have been collected and used for determination of genetic trends of absolute and relative heart weight. The genetic trends have been estimated by regression of the genetic values of the traits over hatch-year. Genetic values of 42,912 individuals, obtained by restricted maximum likelihood, were used for regression analysis. The estimates of the genetic trends for absolute and relative heart weight were found to be -0.08 g and -0.004% per hatch-year, respectively.

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